Chair



June 11, 1929. w, 5, E s 1,717,020

CHAIR Filed April 18, 192 8 3 Sheets-Sheet 1 fiufen'tgr (Mi/[222222 S [ZN/"219 June 1 1, 1929. w s, FERRIS 1,717,020

CHAIR F l d p l 18, 1928 s sheewsheet 2 June 11, 1929. w. s. FERRIS CHAIR 3 Sheets-Sheet 3 Filed April 18, 1928 Imr 51 2 2723 w m a J 3 w w 5 5 4 in w m 3 Z P I Z we a 0/ WW m0 DJ A U V 5% y a M. 2 i L V J Jwv v I 9 W 1 i 1 a fi I 7, I o

Patented June 11, 1929.

UNITED STATES WILLIAM S. FERRIS, OF ELKHART, INDIANA.

CHAIR.

Application filed April 18, 1928.

This invention relates to IU'IPIOVBIHGIlt-S in chairs and it consists of the matters hereinafter described and more particularly pointed out in the appended claims.

The primary object of the invention is to provide in a chair having a back rest, a novel back rest post which is so connected to the seat frame as to be adjusted forwardly and rearwardly with respect to the seat frame about a pivotal axis thereon.

A further object of the invention is to provide an all metal construction of this kind, which is not only simple but is so arranged that the back rest post may be readily adjusted and securely held in the desired position.

These objects of the invention as well as others together with the many advantages thereof will more fully appear as I proceed with my specification.

In the drawings Fig. 1 is a view in side elevation of a chair embodying my invention.

Fig. 2 is a view in rear elevation thereof.

Fig. 3 is a detail vertical sectional view. through a part of the chair on an enlarged scale as taken on the line 3-3 of Fig. 2.

Fig. 4 is another detail vertical sectional view as taken on the line 4 of Fig. 3.

Figs. 5, 6 and. 7 are detail views in elevation of several of the parts employed in my improved chair and which will be more specifically referred to later.

As illustrated and. described herein, the improved construction is embodied in that type of chair which has now become known as a stenographers correct posture chair but as will be apparent, said construction may also be embodied in other types of chairs where the peculiar characteristics thereof makes it of advantage to do so.

Referring now in detail to that embodiment of the invention illustrated in the accompanying drawings, the chair which is made substantially all of metal, includes a supporting base 1 comprising a plurality of tubular metallic legs 22 the top ends of which are held in closely grouped relation by top, bottom and intermediate spiders 3, i and 5 respectively, the bottom ends of said legs being bent outwardly to provide that spread necessary for stability. On the bottom ends of said legs are suitable casters or domes 6 upon which the chair may be easily moved about.

Serial No. 270,823.

In the top end of said standard and hav ing suitable rotative hearing as well as'vertical adjustment with reference to said spiders is a. seat post 7. The top end of said post is reduced in diameter and is threaded to form a relatively short, upright extension 8 connected to the post proper by a shoulder 8.

9 indicates as a whole the seat frame of the chair. Said frame which is rectangular in plan, is wider than it is deep and it consists of front and rear members 10 and 11 respectively and side members 12, all of angle bar stock with the vertical flange facing upwardly from the horizontal flange which faces inwardly. To rigidify the seat frame I provide gusset plates 1313 at the corners, on the under side thereof.

Connecting the mid portions of said front and rear members of the seat frame, is a metallic plate 14 of a width less than that of said seat frame. Said plate includes a horizontally disposed mid portion 15 and front and rear portions 16 and 17 respectively, inclined upwardly in opposite directions and at slightly difierentangles and the free margins thereof engage against the underside of the horizontal flanges of the frame members 10 and 11 and are secured thereto as for instance by spot welding. Disposed centrally in said plate is a hole of a size to permit the post extension 8 to pass-therethrough. Before the seat frame thus described is assembled on the post, I place a bottom clamping plate 18 on the post shoulder 8 and after applying the seat frame thereon I then place a top clamping plate 18 to said mid portion of said plate and then thread a nut 19 on the post extension. lVhen this nut is drawn up tight the two clamping plates securely affix the plate 14; to the seat post. By reason of the different angular inclinations of the plate parts 16 and 17 respectively, the seat frame is pitched 0r tilted, downwardly toward the rear.

Associated with the seat frame thus described is a seat cushion or member--21 so fitting within the upright flanges of the seat frame members as to be removable therefrom when so desired.

22 (see Figs. 3 and 5) indicates a substantially T shaped plate which is fixed at its wider top end to the mid portion of the uprightflange of the rear member 11 of the seat frame. In the narrower portion of said plate which depends below the seat frame is a vertically extending slot 23, the top end of which is rounded and the bottom end of which is squared and on each side of said slot are formed pluralities of rearwardly punched spaced shoulders 2 the purpose of which will appear later. Associated with said T shaped plate and engaged against the seat frame plate let is a pair of edgewise disposed metallic straps -25 with the bent rear ends 2525 thereof secured to the wider portion of the T shaped plate 22 and with the front ends thereof secured to the seat frame plate l t by angle brackets 2626.

Extending between and pivoted at its ends to said straps as at 27-27 is a substantially W shaped stirrup member having a centrally disposed depressed loop 28 therein to receive the bottom or inner end of a tubular seat post 29. A plate 30 is fixed to said stirrup member so as to bridge the loop and a bolt 31 passes through said 100 plate and post end to secure the post end to said stirrup member.

On the front face of the slotted end portion of said T shaped plate 22 is a flat clip 32 (see Fig. 6) which is wider than the slot 23 and the bottom end of said clip is narrowed down and is bent over to form a lip 33 that extends through said slot so as to project a short distance beyond the rear of said plate. In the top end of said flat clip is an opening 341- through which the post 2.) extends to pass through the slot in said plate. At a point betweenthe lip and opening 34 the clip carries a rearwardly and downwardly extending bolt 35 and on said bolt, to the rear of the plate 22 is disposed a transversely extending channel like latch bar 36 the edges of which are adapted to engage in the notches provided between the punched out portions 24: on the rear face of the T shaped plate, at each side of the slot therein. On the threaded end of the bolt is located a spacing tube 37 engaged at one end with the latch and adapted to be engaged at its other end by the hub portion of a hand wheel 38.

The back rest post is bent upwardly to terminate in a straight top end portion 39 to which a. back rest member 40 is adjustably secured in any suitable manner and as the said back rest forms no particular part of the present invention it will not be further described.

When it is desired to adjust the position of the back rest, the hand wheel 38 is loosened so that the latch bar 36 may be moved outwardly far enough on the bolt to clear the projections on the rear face of the T shaped plate. The back rest post is then swung upwardly or downwardly about the pivoted connection 27 with the straps 25 on the under side of the seat frame and will slide through the opening 34tin the clip 32 which in turn moves up or down upon the front face of the plate 22. When the back rest post has been adjusted to the desired position, the hand nut 38 is screwed upon the bolt 35 and through the spacing sleeve 37 will urge the latch bar 36 to engage between the desired projections 2% on the T plate 22 to lock the back rest post in position thereon.

The construction above mentioned although consisting of a few parts, is strong and rigid and may be readily operated to adjust and hold the back rest post into the desired position.

While in describing my invention, I have referred in detail to the form and arrangement of the parts thereof, the same is to be considered as by way of illustration only and not by way of limitations except as may be pointed out in the appended claims.

I claim as my invention:

1. A chair embodying therein, a seat member, a plate depending from the rear of said member and having a slot therein, a back rest post extending through said slot and pivotally connected to the seat member forward of said plate, a clip slidable on one face of said plate and through which said post also extends and means for clamping the clip to said plate.

2. A chair embodying therein, a seat member, a plate depending from the rear of said member and having a slot therein, a back rest post extending through said slot and pivotally connected to the seat member forward of said plate, a clip slidable on one face of said plate and through which said post also extends, a bolt carried by said clip, a member on said bolt engaging with the other face of said plate and extending across the slot therein and a nut on the bolt to tightly engage the member on said bolt with said plate and to draw said clip into engagement with the'first mentioned face of the plate.

3. A chair embodying therein, a seatmember, a plate depending from the rear of said member and having a slot therein, a back rest post extending through said slot and pivotally connected to the seat member forward of said plate, a clip slidable on one face of said plate and through which said post also extends, a bolt carried by said clip, a member on said bolt engaging the other face of said plate and a nut on said bolt to cause said last mentioned member to tightly engage said plate face, said plate face and last mentioned member having interlocking coacting parts thereon.

4. A chair embodying therein, a seat member, a plate depending from the rear of said member and having a vertically extending slot therein, a back rest post extending through said slot and having a pivotal connection with the seat member forward of said plate, a clip member on one side of said plate and through which said post also extends, a boltcarried by said clip member, a second member on said-bolt and engaging the other side of said plate, one of said last mentioned members and said plate having interlocking parts and a nut on the bolt for clamping said last mentioned members to said plate.

A chair embodying therein, a seat member, a plate depending from the rear of said member and having a vertically extending slot therein, back rest post extending through said slot and having a pivotal connection with the seat member forward of said plate, a clip member on the front side of said plate, a bolt carried by said clip member, a channel shape latch on the bolt on the other side of the plate, said plate being formed at each side of the slot to provide spaced notches therein with which the edges of said latch engage and a nut on said bolt to draw said clip member and latch into engagement with said plate.

6. A chair embodying therein, a seat member, a plate depending from the rear of said member and having a vertically extending slot therein, a back rest post extending through said slot and having a pivotal connection with the seat member forward of said plate, a clip member on the front side of said plate, a bolt carried by said clip member, a channel shape latch on the bolt on the other side of the plate, said plate being formed at each side of the slot to provide spaced notches therein with which the edges of said latch engage and a nut on said bolt and a sleeve on said bolt between said latch member and nut.

7. A chair embodying therein, a seat member, a plate depending from the rear there of and having a slot therein, a pair of edge wise disposed straps on the underside of said seat member and fixed at their inner ends thereto and at their outer. ends to said plate, a back rest post extending through the slot in said plate, means secured to said post and pivoted to said straps and means associated with the plate for securing the post in the desired position thereon.

8. A chair embodying therein, a seat member, a plate depending from the rear thereof and having a slot therein, a pair of edgewise disposed straps on the underside of said seat member and fixed at their inner ends thereto and at their outer ends to said plate, a member extending between and pivoted to said straps, a back rest post extending through said slot in said plate and secured to said member extending between and pivoted to said straps and means associated with the plate for securing the post in the desired position therein.

9. A chair embodying therein, a seat member, a plate depending from the rear thereof and having a slot therein, a pair of edge- Wise disposed straps on the underside of said seat member and fixed at their inner ends thereto and at their outer ends to said plate, a substantially W shaped member pivoted at its ends to said straps and having a centrally disposed loop therein, a back rest post extending through said slot and fixed at one end in said loop and means associated with the plate for securing the post in desired position thereon.

10. A chair embodying therein, a rectangular seat frame comprising front, rear and side parts of angle bar, a plate connecting the front and rear parts of the frame together, a second plate fixed to and depending from said rear part of the frame and having a slot therein, a pair of edgewise disposed straps on the underside of said seat frame plate and connected at their front ends thereto and at the rear ends to said second plate, a member pivoted at its ends to said straps near their front ends and having a centrally disposed loop therein, a back rest post extending through said slot and fixed at one end in said loop and means associated with the plate for securing the post in the desired position therein.

In testimony whereof, I have hereunto set my hand, this 15th day of March, 1928.

WILLIAM S. FERRIS. 

